Traveling grate stoker



Patented Dec, 10, 1929 UNITED srArss RICHARD ZINKERNAGEL, OF NEW YORK N.Y., ASSIGNOR TO INTERNATIONAL 0011- BUSTION ENGINEERING CORPORATION, OF

DELAWARE TRAVELING GRATE STOKER 7 Application filed September 17, 1927.Serial No. 220,203.

My invention relates to traveling grate stokers and has specialreference to means for preventin excess blowing of air and excessleakage 0 fuel at the sides of the grate of such stokers.

An object of the invention is to provide novel and improved sealingmeans of this character. 1

Anotherobject of my invention is to provide means of the characterindicated that are adjustable from the exterior of the furnace tocompensate for contractionand expansion of the upper runof the grate;

The several features of the invention, whereby the above mentioned andother objects may be attained, will be clearly understood from thefollowing description and accompanying drawings, in which,

Figure 1 is a transverse sectional view of a traveling grate stokerembodying the fea-' tures of the invention in their preferred form;

Fig. 2 is a sectional plan view, taken on the line 22 of Fig. 1

Fig. 3 is a detail view in perspective of a portion of a component partof my improved sealing means and Fig. 4 is a longitudinal sectionalView, part 1y diagrammatical, of a portion of the improved stoker.

The stoker illustrated in the drawings is provided with the usual chaingrate 2, and combustion chamber 4 having longitudinal side walls 6 andfront and rear walls 8 and 10, respectively. The stoker is furtherprovided with a series of side sealing members 12 that are arranged endto end and rest upon a shelf 14 formed on each of the longitudinal sideframes 16 of the stoker. Each sealing member 12 has a flat portion 18 atthe upper part of its inner side that is adapted to engage outwardlyprojecting ribs 20 on the outer links of the chain. A steel strip or bar22 has its inner portion resting upon the outer portion of the topsurface of the sealing members of each series and has its outer portionreceived in a longitudinally extending groove 24 in the associatedlongitudinal side frame 16. A ledge plate 26 is mounted in each of thelongitudinal side walls 6 and extends over NEW YORK, N. 'Y., ACORPORATION OF the top of the associated side frame16 and I the steelstrip or bar 22, and has a depending rib portion 28 that is arrangedadjacent the inner side of the bar 22 with its bottom side arranged inclose proximity to the inner portion of the top surfaces of the sealingmemberg 12.

Except as hereinafter described, the parts above referred to may be, andpreferably are, substantially the same as the corresponding parts of thetraveling grate stoker described and claimed in my co-pendingapplication Serial No. 220,202, filed September 17, 1927.

In accordance with my present invention, means is provided which iscontrollable by the operator from the front of. the furnace .foradjusting the side sealing members toward the sides of the grate, andfor permitting them to be moved in a direction away from the grate, tocompensate for contraction.

and expansion of the grate. As shown, the

steel strip or bar 22 has a plurality of, plates 30 secured to its underside. Each of these plates 30'is provided with an inclined or camsurface 32 which is adapted to engage the '34 and the outer surfaces ofthe ribs being inclined to conform with the associated cam surface 32.

fouterjsides of abutting end portions ofadjal The forward endof eachbar'22 extends beyond the front of the furnace and has an upturned endportion 36 which is provided with an aperture 38. A bolt 40 extendsthrough this aperture and itsinner endissecure in the front wall of thestoker. Nuts 41 are arranged on the bolt at opposite sides of theportion 36 so that by adjusting the nuts eachbar 22 may be movedrearward and forward andheld in adjusted position.

WVith this construction it will be apparent that upon adjusting each bar22 forward the cam plates 80 will gradually force all of the sealingmembers of the associated series to-.-.,

ward the side of the upper run of the grate, and that upon adjustingeach bar 22 rearward the sealing members arepermitted to work away fromthe upper run of the chain when they have been forced into too closeengagement therewith. It will be apparent that the sealing members onboth sides of the upper run of the grate may be easily adjusted by theoperator from a convenient position at the front of the furnace.

t As will be evident to those'skilled in the of the grate.

2. A traveling grate stoker having, in combination. side seal ng membersarranged end to end adjacent at least one of the sides of the upper runof the grate, and devices under the control of the operator from theoutside of the stoker for moving said members toward said side.

1 w 3, A traveling grate stoker having, in combmat on, side sealingmembers arranged end to end adjacent at least one of the sides of theupper; run of the grate, a bar mounted for movement longitudinally ofthe grate, and means carried by said bar for moving said sealing memberstoward said side of the grate v upon movement of the bar longitudinallyin onev direction. 7 1

4. A traveling grate stoker having, in combination, side sealing membersarranged end to end adjacent at least one of the sides of the upper runof the grate, a bar mounted for movement longitudinally of the grate,and members having cam surfaces for engagement with the outer sides ofsaid sealing members for moving said sealing members toward said sideupon movement of said bar in one direction. V

5. A traveling grate stoker having, in comblnation, side seallng membersarranged end 7 to end adjacent at least one of the sides of the upperrun of the grate, a bar mounted ;for movement longitudinally of thegrate,

- and members having cam surfaces for engagement wlth the outer sldes ofsaid seal mg members for moving sald sealing members toward said sideupon movement of said bar in one dlrectlon, means for movlng said barand having its inner portion resting upon v V 7. A traveling gratestokerhaving, in combination, side sealing members arranged adjacent at leastone of the sides of the upper run of the grate, a shelfon'which'said'side sealing members are mounted, abar arrangedlongitudinally of said side sealing members with its inner portionresting upon theouter portion of the top side of said sidesealingmembers, means for moving said side sealing members toward saidside'of the grate upon movement of said bar in one direction, comprisingcam platessecured to the under side of said bar and adapted tooperatively engage the outer sides of said side sealing members.

In testimony whereof, I have signed my name to this specification-this15th day of September, 1927. a

H RICHARD ZINKERNAGEL.

in said direction and permitting said bar to be moved in the oppositedirection to per- Init said sealing members to be moved in a 1 directionaway from said grate.

6. traveling grate stoker having, in comblnation, slde sealing membersarranged ad jacent at least one of the sides of the upper runof thegrate, a shelf on which said side sealing members are mounted, a bararranged longitudinally of said side sealing members

